add: new tictactoe game

add: testing to tictactoe

rename: tictactoe

add: tictactoe steps

refactor: tictactoe const names

refactor: tictactoe loop

add: tictactoe bad switch example (fallthrough)

refactor: tictactoe loop skin

remove: tictactoe changable skin

refactor: tictactoe all

remove: tictactoe unnecessary base dir

add: tictactoe slices

add: tictactoe slices

remove: tictactoe fallthrough

rename: tictactoe slices 10 -> 09

update: loops skin tictactoe

add: tictactoe randomization

add: tictactoe infinite loop and labeled break

refactor: tictactoe rand and infinite loop

add: tictactoe buggy winning algo

add: tictactoe more tests

rename: tictactoe wrongPlay to wrongMove

add: tictactoe even more tests

fix: tictactoe

rename: tictactoe waitForInput to wait

add: tictactoe os.args gameSpeed

remove: tictactoe unnecessary files

rename: tictactoe game messages

refactor: tictactoe main loop

add: types and arrays

x-tba/tictactoe/15-os-args/turn.go

@@ -0,0 +1,45 @@
+package main
+
+import "fmt"
+
+// nextTurn prints the board for the next turn and checks for the winning conditions.
+// if win or tie: returns false, otherwise true.
+func nextTurn() bool {
+	play()
+	printBoard()
+
+	fmt.Printf("\n>>> PLAYER %q PLAYS to %d\n", player, lastPos+1)
+
+	// the switch below is about winning and tie conditions.
+	// so it is good have checkWinOrTie() as a simple statement.
+	// totally optional.
+	switch checkWinOrTie(); {
+	default:
+		switchPlayer()
+		printStatus()
+
+	case wrongMove:
+		fmt.Printf(">>> CELL IS OCCUPIED: PLAY AGAIN!\n")
+		wrongMove = false // reset for the next turn
+
+	case won, tie:
+		if won {
+			fmt.Println(">>> WINNER:", player)
+		} else {
+			fmt.Println(">>> TIE!")
+		}
+		return false
+	}
+	return true
+}
+
+// printStatus prints the current status of the game
+// it cannot access to the names (vars, consts, etc) inside any other func
+func printStatus() {
+	fmt.Println()
+
+	progress := (1 - (float64(turn) / maxTurns)) * 100
+	fmt.Printf("Current Turn           : %d\n", turn)
+	fmt.Printf("Is there a winner      : %t\n", won)
+	fmt.Printf("Turns left             : %.1f%%\n", progress)
+}